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Refrigerant filling apparatus of refrigerating and air conditioning apparatus and refrigerant filling method of refrigerating and air conditioning apparatus

A technology of an air-conditioning device and a filling method, which is applied in the directions of refrigerants, refrigerators, refrigeration components, etc.

Inactive Publication Date: 2011-07-27
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the difference in the volume of the refrigerant circuit due to the above-mentioned installation environment, the required amount of refrigerant is different, so it is difficult to fill the refrigerant circuit with all the required amount of refrigerant according to the volume in advance

Method used

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  • Refrigerant filling apparatus of refrigerating and air conditioning apparatus and refrigerant filling method of refrigerating and air conditioning apparatus
  • Refrigerant filling apparatus of refrigerating and air conditioning apparatus and refrigerant filling method of refrigerating and air conditioning apparatus
  • Refrigerant filling apparatus of refrigerating and air conditioning apparatus and refrigerant filling method of refrigerating and air conditioning apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0068] Hereinafter, an air conditioner as an example of a refrigerating and air-conditioning apparatus will be described as an example. As the refrigerating and air-conditioning apparatus, there are, for example, refrigerators and the like in addition to air conditioners.

[0069] Figure 1 to Figure 8 is a diagram showing Embodiment 1, figure 1 It is a refrigerant circuit diagram at the time of refrigerant charging of the air conditioner, figure 2 A refrigerant filling flowchart showing a refrigerant filling method, image 3 It is a diagram showing the control object of the control device 30 when the refrigerant charging amount judging operation mode is selected, Figure 4 It is a graph showing the relationship between the outside air temperature and the time until the refrigeration cycle stabilizes, Figure 5 It is a figure which shows the control method of the rotation speed of the compressor 1 at the time of refrigerant charging, Figure 6 It is a figure showing the...

Embodiment approach 2

[0144] Figure 9 It is a figure which shows Embodiment 2, and is a refrigerant circuit diagram at the time of refrigerant charging of an air conditioner. and figure 1 The difference is that the decompression solenoid valve 4 is built in the indoor unit B side.

[0145] In the case where the pressure reducing solenoid valve 4 is built in the indoor unit B, by following Figure 9 Circulating in the refrigerant circuit in the direction of the arrow, the same refrigerant charging method as that shown in Embodiment 1 can be realized. That is, in order to grasp the state of the refrigerant quantity, it is shown that when the decompression solenoid valve 4 is located on the side of the outdoor unit A, it is necessary to perform a heating operation, and when it is located on the side of the indoor unit B, it is necessary to perform a cooling operation.

[0146] Among them, the section on the refrigerant circuit where the density of the refrigerant is the highest, that is, the refr...

Embodiment approach 3

[0148] On the other hand, even with figure 1 The same refrigerant circuit, and has an automatic control valve 15 that can realize opening and closing between the refrigerant cylinder 10 and the refrigeration circuit, such as Figure 10 The above-mentioned operation method can also be used for the refrigerant charging method as shown.

[0149] Figure 10 It is a figure which shows Embodiment 3, and is a refrigerant circuit diagram at the time of refrigerant charging of an air conditioner.

[0150] In the refrigerant filling method of the present invention, when it is judged that the amount of refrigerant is appropriate, the heating operation mode is stopped, the four-way valve 2 is switched while the compressor 1 is stopped, and furthermore, by setting the decompression solenoid valve 4 to full Open, thereby eliminating the pressure difference in the refrigerant circuit due to the heating operation, and as a result, excessive refrigerant filling in the future is suppressed. ...

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Abstract

The present invention is directed to a refrigerant filling apparatus of the refrigerating and air conditioning apparatus that can automatically finish filling of a refrigerant after filling to an appropriate amount, without a need to install an extra valve except for a valve provided at a refrigerant cylinder, in between the refrigerating and air conditioning apparatus and the refrigerant cylinder, which is necessary for filling the refrigerant. The refrigerant filling apparatus of the refrigerating and air conditioning apparatus, which includes: a refrigerant circuit having a compressor 1, afour-way valve 2, an indoor side heat exchanger 3, a pressure reducing solenoid valve 4, an outdoor side heat exchanger 3, and an accumulator 6; a refrigerant cylinder 10 connected to the refrigerantcircuit; a control unit that controls filling of the refrigerant from the refrigerant cylinder 10 to the refrigerant circuit and decides refrigerant filling modes; and a display unit installed to thecontrol unit and displays the refrigerant filling modes.

Description

technical field [0001] The invention relates to a refrigerant filling device for refrigerating and air-conditioning devices and a refrigerant filling method for refrigerating and air-conditioning devices. Background technique [0002] A refrigerating and air-conditioning apparatus constituting a refrigerating cycle generally includes an indoor unit, an outdoor unit, and piping connecting the indoor unit and the outdoor unit. The indoor unit includes an indoor side heat exchanger and the like. In addition, the outdoor unit has an outdoor side heat exchanger, a compressor, a decompression solenoid valve, and the like, and each of them is connected by piping inside the outdoor unit. The indoor unit and the outdoor unit composed of these are connected by piping at the installation site, and function as a refrigerating and air-conditioning apparatus. [0003] There are various installation environments for refrigerating and air-conditioning units. Connect the connection pipin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B45/00
CPCF25B45/00F25B13/00F25B2345/003
Inventor 堺达纪四十宫正人柴广有
Owner MITSUBISHI ELECTRIC CORP
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